Method for Producing a Catalytically Active Film and Film Which Can Be Manufactured by Means of This Method

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This patent describes a simple and reproducible method for producing catalytically active films, in particular films with immobilized photocatalysts. The core process uses surface-modified cellulose nanofibers as a matrix to immobilize catalyst particles, such as photocatalysts like TiO₂ or carbon nitride. The resulting material can be formed as either a self-supporting membrane or as a film on porous substrates, enabling practical catalytic applications that require stable, immobilized catalysts.

Use CasesContent extracted from patent full text and abstract with AI.

• Photocatalytic hydrogen production from water splitting
• Photocatalytic degradation of water contaminants (e.g., dyes or pharmaceuticals)
• Efficient immobilization of powder-based catalysts for industrial or laboratory chemical processes
• Fabrication of catalytic membranes or films for continuous flow reactors
• Development of environmentally friendly catalytic materials based on bio-derived cellulose

BenefitsContent extracted from patent full text and abstract with AI.

• Simple, scalable, and cost-effective production method
• Good reproducibility and versatility in film size and shape
• Enhanced stability and longevity of immobilized catalysts during reactions
• Broad applicability with various types of catalysts, especially photocatalysts
• Use of renewable, bio-based cellulose materials as the support matrix
• Possible formation of both self-supporting membranes and films on different substrates
• Facilitation of continuous or large-scale catalytic processes with reduced catalyst loss

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Patent Abstract

Die vorliegende Erfindung betrifft ein Verfahren zur Herstellung eines katalytisch aktiven Filmes mit mindestens einem immobilisierten katalytisch aktiven Material, insbesondere mindestens einem photokatalytisch aktiven Material, umfassend die Schritte: Bereitstellen einer Dispersion von oberflächenmodifizierten Zellulosefasern, insbesondere Zellulosenanofasern, in einem Lösungsmittel; Zugabe von mindestens einem Katalysator, insbesondere mindestens einem pulverförmigen Katalysator, zu der Dispersion; Abtrennen des Feststoffes aus Zellulosefasern und pulverförmigen Katalysator vom Lösungsmittels; und Trocknen des abgetrennten Feststoffs aus Zellulosefasern und pulverförmigen Katalysator unter Ausbildung des katalytisch aktiven Filmes.